UIWebView在加載頁面時閃爍白色

Question

我已經構建了適用於iOS的WebApp。當我點擊/點擊移動到頁面 - 例如從頁面 - index.html到page2.html，它閃爍白色。你知道爲什麼，以及如何解決這個問題？

網站在瀏覽器（Safari，IE，Firefox和Chrome）中運行得非常棒，但不是作爲應用程序。

我的代碼是：

import UIKit 

class ViewController: UIViewController { 


@IBOutlet weak var webView: UIWebView! 

override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 


    webView.loadRequest(NSURLRequest(URL: NSURL(fileURLWithPath: NSBundle.mainBundle().pathForResource("index", ofType: "html")!))) 


} 

override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 


} 

Answer 1

試試我的代碼將幫助你！

第1步：將UIWebView和UIActivityIndicatorView提取到您的視圖控制器。 步驟2：委託UIWebView查看控制器併爲UIWebView和UIActivityIndicatorView創建插座。

3步：視圖控制器上選擇UIActivityIndicatorView然後去屬性檢查器 - >活動指示燈查看 - >選擇動畫效果和隱藏在行爲

第4步停止時：添加以下代碼到你的ViewController。

import UIKit 

class ViewController: UIViewController,UIWebViewDelegate{ 

    @IBOutlet var loader: UIActivityIndicatorView! 
    @IBOutlet var webView: UIWebView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 
     self.automaticallyAdjustsScrollViewInsets = false //to avoid auto scrolling. 
     functionOfWebView() 

    } 

    func functionOfWebView() 
    { 
     let URL = NSURL(string: "http://www.google.com") 
     //let URL = NSBundle.mainBundle().URLForResource("index", withExtension: "html") //For local html file(index.html) with local file hyperlink(file.html) see on video tutorial 
     let request = NSURLRequest(URL: URL!) 
     webView.loadRequest(request) 
    } 

    func webViewDidStartLoad(webView: UIWebView) 
    { 
     loader.startAnimating() 
    } 

    func webViewDidFinishLoad(webView: UIWebView) 
    { 
     loader.stopAnimating() 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 

    } 


} 

在雨燕3.0

import UIKit 

class ViewController: UIViewController,UIWebViewDelegate{ 

    @IBOutlet var loader: UIActivityIndicatorView! 
    @IBOutlet var webView: UIWebView! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     self.automaticallyAdjustsScrollViewInsets = false //to avoid auto scrolling. 
     functionOfWebView() 
    } 

    func functionOfWebView() 
    { 
     let URL = NSURL(string: "http://www.google.com") 
     //let URL = Bundle.main.url(forResource: "index", withExtension: "html") //For local html file(index.html) with local file hyperlink(file.html) see on video tutorial 
     let request = NSURLRequest(url: URL! as URL) 
     webView.loadRequest(request as URLRequest) 
    } 

    func webViewDidStartLoad(_ webView: UIWebView) 
    { 
     loader.startAnimating() 
    } 

    func webViewDidFinishLoad(_ webView: UIWebView) 
    { 
     loader.stopAnimating() 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

} 

如果你混淆或使用本地HTML文件，然後看到這個Youtube tutorial